Geological Characteristics and Preliminary Genesis Exploration of the Sakay Gold Deposit in Vientiane, Laos

Authors

  • Demin Yang

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China
  • Chenming Liu

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China
  • Yuan Qin

    Yunnan Wuyan Technology Co., Ltd., Kunming 650091, China 
  • Wei Huang

    Yunnan Wuyan Technology Co., Ltd., Kunming 650091, China 
  • Nan Yang

    Yunnan Wuyan Technology Co., Ltd., Kunming 650091, China
  • Zheng Wang

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China 
  • Yungang Xiang

    Institute of Resources and Environment, Yunnan Land and Resources Vocational College, Kunming 650093, China

DOI:

https://doi.org/10.30564/jees.v7i5.8514
Received: 21 January 2025 | Revised: 24 February 2025 | Accepted: 28 February 2025 | Published Online: 6 May 2025

Abstract

The Sakay gold deposit in Vientiane, Laos, is located in the Indochina landmass of the southeastern segment of the Tethys orogenic belt, specifically within the Vientiane-Pakse micro-landmass and the Vientiane-Pakse metallogenic belt. This area is regionally significant for the concentration of minerals such as gold, copper, and tin. The host rocks of the deposit are intermediate volcanic lavas and volcanic tuffs, occurring in near-east-west brittle shear structural fractures through hydrothermal filling and metasomatism. The ore exhibits granular texture, subhedral texture, porphyritic texture, and oriented polycrystalline texture, with structural features such as disseminated, vein-like, and cataclastic breccia. The main ore minerals are pyrite, sphalerite, galena, and chalcopyrite, while the gangue minerals are primarily quartz, calcite, and dolomite. Gold is mainly present as included gold or fissure gold within the crystal lattices and microfractures of minerals such as pyrite and sphalerite. Based on mineral assemblages and generation timing, the mineralization can be divided into three stages: arsenopyrite-pyrite-dolomite-quartz (I), sphalerite-galena-chalcopyrite-calcite (II), and siderite (III), with the latter stages often overlaying the former, showing evident cross-cutting and metasomatic phenomena. The surrounding rocks in the mining area are altered, mainly showing silicification, carbonatization, limonitization, sericitization, and chloritization. Preliminary studies suggest that this deposit is a low-temperature hydrothermal gold deposit within a brittle shear zone.

Keywords:

Laos; Gold Deposit; Hydrothermal; Porphyry; Brittle Shear

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How to Cite

Demin Yang, Chenming Liu, Yuan Qin, Wei Huang, Nan Yang, Zheng Wang, & Yungang Xiang. (2025). Geological Characteristics and Preliminary Genesis Exploration of the Sakay Gold Deposit in Vientiane, Laos. Journal of Environmental & Earth Sciences, 7(5), 233–243. https://doi.org/10.30564/jees.v7i5.8514

Issue

Vol. 7 , Iss. 5 (May 2025)

Article Type

Article

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Copyright © 2025 Demin Yang, Chenming Liu, Yuan Qin, Wei Huang, Nan Yang, Zheng Wang, Yungang Xiang

Creative Commons License

This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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